Numerical Investigation of Higher Order Propagation Modes in High-Power Magnetic Compression Lines

IF 1.5 4区物理与天体物理 Q3 PHYSICS, FLUIDS & PLASMAS

IEEE Transactions on Plasma Science Pub Date : 2025-06-06 DOI:10.1109/TPS.2025.3574027

Vitaly E. Patrakov

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Abstract

In this article, the influence of higher order propagation modes on pulse transformation in ferrite-filled coaxial nonlinear transmission lines (NLTLs) in multigigawatt pulse compression regime [magnetic compression line (MCL)] is investigated theoretically. A discussion of the application of higher order mode concept to short-pulse time-domain systems is given, which highlights the methodological difficulties associated with such a type of study. A method of dynamical mode analysis in time domain is proposed based on energy considerations and coordinate components of electromagnetic field. Numerical simulations are conducted to study the formation and propagation of modes in a coaxial line partially filled with ferrite, evaluating the influence of nonaxisymmetric modes, axisymmetric TE modes, and axisymmetric TM modes on pulse formation. Such an approach allows to factually demonstrate that the influence of higher order modes on pulse formation in MCLs is negligible, and the main process governing pulse formation is the interaction of nonlinear ferrite material with the fundamental dispersive mode TM₀₀. The presented information deepens the understanding of physical processes occurring in coaxial lines partially filled with ferrite under the application of high-power pulses.

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大功率磁压缩线路中高阶传输模式的数值研究

本文从理论上研究了高阶传输模式对多吉瓦脉冲压缩条件下铁氧体填充同轴非线性传输线（NLTLs）脉冲变换的影响。讨论了高阶模态概念在短脉冲时域系统中的应用，突出了与此类研究相关的方法上的困难。提出了一种基于能量考虑和电磁场坐标分量的时域动力模态分析方法。通过数值模拟研究了铁氧体部分填充的同轴线中模式的形成和传播，评估了非轴对称模式、轴对称TE模式和轴对称TM模式对脉冲形成的影响。这种方法可以实际证明，高阶模式对mcl中脉冲形成的影响可以忽略不计，控制脉冲形成的主要过程是非线性铁氧体材料与基色散模式TM00的相互作用。所提供的信息加深了对在高功率脉冲作用下部分填充铁氧体的同轴线上发生的物理过程的理解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Plasma Science 物理-物理：流体与等离子体

CiteScore

3.00

自引率

20.00%

发文量

538

审稿时长

3.8 months

期刊介绍： The scope covers all aspects of the theory and application of plasma science. It includes the following areas: magnetohydrodynamics; thermionics and plasma diodes; basic plasma phenomena; gaseous electronics; microwave/plasma interaction; electron, ion, and plasma sources; space plasmas; intense electron and ion beams; laser-plasma interactions; plasma diagnostics; plasma chemistry and processing; solid-state plasmas; plasma heating; plasma for controlled fusion research; high energy density plasmas; industrial/commercial applications of plasma physics; plasma waves and instabilities; and high power microwave and submillimeter wave generation.